refugium

This term is primarily used in biological and geological sciences to describe a specific geographic sanctuary. It carries a technical, academic register and is rarely used in casual conversation. While a "refuge" is a general term for any place of safety, a "refugium" specifically refers to a biological population's survival zone during large-scale environmental shifts, such as ice ages.

Because the word is derived from Latin, it follows a specific pluralization pattern. In scientific writing, the plural form "refugia" is almost exclusively used instead of the standard English "refugiums."